Railway rolling stock – Special car bodies – Sleeping
Patent
1977-08-18
1978-12-26
Makay, Albert J.
Railway rolling stock
Special car bodies
Sleeping
105433, 105449, 280163, B65G 6702
Patent
active
041312090
ABSTRACT:
A motor bus has a side door at its forward end which when opened accommodates laterally outward extension of a ramp from a normally stowed position below the floor of the bus, a portion of the ramp adjacent its outer end serving as a step for entering the bus when the ramp is in its stowed position. Extending longitudinally of the ramp and journalled therein at its outward end is a lead screw which is rotatively driven by a rotary power motor mounted to the inner end of the ramp. A nut threadedly engaging the screw is hingedly mounted to the lower end of a step riser which is hinged at its upper end to the bus floor so as to swing up to a position co-planar with the ramp when the ramp is fully extended. A bell crank having an arm underlying the ramp is actuatable by a fluid motor to swing the inner end of the ramp and lower end of the riser upwardly to their co-planar relation when the motor comes into abutment with the nut during outward extending movement of the ramp.
REFERENCES:
patent: 1717303 (1929-06-01), Barclay
patent: 2797104 (1957-06-01), Drobney et al.
patent: 3730361 (1973-05-01), Haynes
patent: 4022337 (1977-05-01), Eichenhofer et al.
patent: 4027807 (1977-06-01), Thorley
patent: 4058228 (1977-11-01), Hall
Makay Albert J.
Undergood Donald W.
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